Polyphone disambiguation aims to capture accurate pronunciation knowledge
from natural text sequences for reliable Text-to-speech (TTS) systems. However,
previous approaches require substantial annotated training data and additional
efforts from language experts, making it difficult to extend high-quality
neural TTS systems to out-of-domain daily conversations and countless languages
worldwide. This paper tackles the polyphone disambiguation problem from a
concise and novel perspective: we propose Dict-TTS, a semantic-aware generative
text-to-speech model with an online website dictionary (the existing prior
information in the natural language). Specifically, we design a
semantics-to-pronunciation attention (S2PA) module to match the semantic
patterns between the input text sequence and the prior semantics in the
dictionary and obtain the corresponding pronunciations; The S2PA module can be
easily trained with the end-to-end TTS model without any annotated phoneme
labels. Experimental results in three languages show that our model outperforms
several strong baseline models in terms of pronunciation accuracy and improves
the prosody modeling of TTS systems. Further extensive analyses demonstrate
that each design in Dict-TTS is effective. The code is available at
https://github.com/Zain-Jiang/Dict-TTS.

本文提出了一种基于语义感知的生成文本到语音模型 Dict-TTS，该模型结合在线网站词典通过 S2PA 处理 module，实现了对多音字消除（polyphone disambiguation）的有效解决，同时提高了 TTS 系统的发音准确性及韵律建模，该模型在三种语言的实验结果显示优于其他基线模型。